Can seaming machine



July 7, 1931. E. FORSBERG 1,813,350

7 CAN SEAMI NG MACHINE Filed March 19, 1930 3 Sheets-$heet l f/VI/E/V TOR July 1931.

E. FORSBE'RG 1,813,350

CAN SEAMING MACHINE Filed March 19, 1930 3 sheetsheet 2.

HiiIIIII' July 7, 1931. E. FORSBERG CAN SEAMING MACHINE Filed March 19, 1950 3 Sheets-Sheet 3 rzg 14.21.? 4

Patented Jul 7, 1931 UNITED STATES EDWIN FORSIBEEG, OF SAN JOSE, CALIFORNIA CAN SEAMING MACHINE Application filed March 19, 1930. Serial No. 437,129.

This invention relates particularly to a machine for forming the seam on an oval shaped can.

It is the object of the invention to provide a machine of the character indicated that will be simple in form and construction, positive, accurate and smooth in operation, strong, durable, and highly efiicient in its practical application.

In the drawings:

Figure 1 is a vertical transverse section through a machine embodying my inven tion.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is an elevation on line 44, Figure 3.

Figure 5 is an elevation of a portion of the seaming roller carrier operating mechanism.

Figure 6 is a diagrammatical illustration of the gear train operating the seaming roller carrier.

Figure 7 is a diagrammatical illustration of the gear train operating the cam member.

Figure 8 is a diagram illustrating the I path of travel of the seaming roller.

In the embodiment of the invention here in disclosed 1 indicates the head spindle carrying the seaming chuck 2, the chuck being oval in form as shown in dotted lines in Figure 3 and defining the path of travel over which the seaming roller must travel to scam the can positioned thereon.

At 3 is shown the upper head casing revolubly mounted on spindle 1 as at 4 and in concentric relation thereto. The casing 3 is driven by a gear 5 and a driving gear 6 meshing therewith. Revolubly mounted on the casing 3 is a double gear 78, the part 7 meshing with a drive gear 9 rotating as a unit with gear 6.

A lower head casing 10 is adjustably mounted on casing 3 as indicated at 11 to rotate as a unit therewith, but the center of the lower casing 10 is eccentrically disposed relative to the center of the upper casing 3 as indicated at 12. In the present case the two centers are spaced apart a distance equal to one-fourth of the difference between the long and short axes of the oval seam to be made, and in the starting position are aligned with the said long axis. The result of this construction is that when the head rotated about its axis 105- the axis 100; of the lower casing 10 will travel in a circle about the axis 1a.

Mounted on bearings 13 in lower casing 10 and in concentric relation thereto is a sleeve 14 provided with a gear 15. The sleeve is rotated by means of an idler gear 16 meshing therewith and a pair of pinions 17 and 13 mounted on a stub shaft 19 and meshing with gears 16 and 8 respectively.

The driving means for the head 3- 10 and the sleeve 14 are so proportioned that the said head and sleeve will rotate at the same speed but in opposite directions about their two axes.

Mounted upon the lower end of sleeve 14 is a slide frame 20 having guides 20a formed in its under side in which is slidably mounted a slide 21 having a central opening 22 formed therein. Upon the under side of one end of the slide is adjustably mounted a block 23 as at 24, and on the under side of the block is mounted a seaming roller 25 in operative relation to the chuck 2. The slide 21 is for the purpose of permitting the roller 25 to be moved into and out of operative contact with the edge of the can when engaging chuck 2, and to secure this contact for the desired period of time I provide the following mechanism.

A cam member is shown at 26 revolubly mounted with respect to sleeve 14 and inserted between the lower edge of casing 10 and the frame 20 and in concentric relation to the'sleeve 14. In the'lower side of the member 26 is formed a cam track 27 in which is mounted a roller 28 mounted on a pin 29 set in slide 21 and passing through an opening 30 in frame 20. The cam member 26 is rotated by means of gear 31 formed thereon meshing with an idler vgear 32 which in turn meshes with a pinion 33 mounted on a stub shaft 34 carrying a pinion 35 meshing with gear 8. By means of this train of gears with proper relative pitch diameters the cam is rotated in the same direction as the seaming roller but at a little slower rate of speed. The movement of the cam member 26 and the form of the cam track 27 are such that the seaming roller is held in a working position during one portion, as A, of one complete revolution of member 26 and during which period the seaming operation istak ing place, and out of a working position during the remainder of the revolution, as B, during which period one can is being removed from the chuck and another can positioned thereon. 7

\Vhen the device is in operation the head casing and all of the parts mounted thereon revolve as a unit about the axis laand in one direction, while the part 14: has an inde-' pendent 'rotative movement in the opposite direction about axis 10a, the cam member 26 also having an independent rotative movement about axis 10m in the same direction as part 14 but at a slower rate of speed, so that the roller 25 is forced to travel in an oval path as indicated clearly in Figure 8. In this diagram itis made clear the the axis 106; travels in a circle about the axis 1a in the direction indicated by arrow 36, while the roller 25 travels along the path and in the direction indicated by the arrow 37.

.It is to be understood,- of course, that while I have herein shown and described but one specific embodiment of the invention, changes in form, construction, and method of assembly and operation, may be made within the scope of the appended claims.

I claim:

1. An oval seamer head comprising aspi'ndle having an oval chuck mounted there'- on, a head member mounted to rotate in one direction about the spindle and in concentric relation thereto, and actuating means therefor, a second member mounted to rotate as a unit with the head member and mounted for independent rotation about said spindle in eccentric relation thereto, means for rotating said second member at the same speed but in the opposite direction to the head member, a seaming roller mounted on the second member in operative relation to the chuck. v v

2. An oval seamer head comprising a. spindle having'an oval chuck mounted thereon, a headmember revolubly mounted thereon in concentric relation thereto, a sleeve revolubly mounted in the head member in eccentric relation to the spindle, means for rotating the head and sleeve at equal speeds in oppositedirections, and a seaming roller mounted on the sleeve in operative relation to tliech-u'ck. V a

3'. An oval seamer head' comprising a spindle having an oval chuck thereon, a top head member revolubly mounted thereon in concentric relation thereto, a lower head member mounted for lateral adjustment on the top head member, a sleeve revolubly and eccentrically mounted in the lower head member, means for rotating the head members and the sleeve at equal speeds in opposite directions, and a seaming roller mounted on the sleeve in operative relation to the chuck;

4, An oval seamer head comprising a spindle having an oval chuck mounted thereon, ahead member revolubly mounted thereon in concentric relation thereto, a sleeve revolublyand eccentrically mounted in the head member, means for rotating the head and sleeve in opposite directions at the same speed, a seaming roller adjustably mounted on the sleeve for movement into and out of operative engagement with the chuck, and adjusting means for the roller comprising a cam member concentrically mounted on the sleeve, means for rotating the cam member in the same direction as the sleeve but at a slower rate of speed, the said cam ,member having a cam track formed therein, and a follower mounted on the roller and engaging the cam track.

EDWIN FORSBERG.

ion

ios 

